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首页> 外文期刊>Journal of Computational Physics >An efficient Adaptive Mesh Refinement (AMR) algorithm for the Discontinuous Galerkin method: Applications for the computation of compressible two-phase flows
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An efficient Adaptive Mesh Refinement (AMR) algorithm for the Discontinuous Galerkin method: Applications for the computation of compressible two-phase flows

机译:用于不连续Galerkin方法的高效自适应网格细化(AMR)算法:用于计算可压缩两相流的应用

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摘要

We present an Adaptive Mesh Refinement (AMR) method suitable for hybrid unstructured meshes that allows for local refinement and de-refinement of the computational grid during the evolution of the flow. The adaptive implementation of the Discontinuous Galerkin (DG) method introduced in this work (ForestDG) is based on a topological representation of the computational mesh by a hierarchical structure consisting of oct-quad- and binary trees. Adaptive mesh refinement (h-refinement) enables us to increase the spatial resolution of the computational mesh in the vicinity of the points of interest such as interfaces, geometrical features, or flow discontinuities. The local increase in the expansion order (p-refinement) at areas of high strain rates or vorticity magnitude results in an increase of the order of accuracy in the region of shear layers and vortices.
机译:我们提出了一种适用于混合非结构化网格的自适应网格细化(AMR)方法,其允许在流动的演变期间局部改进和计算网格的去改进。 在该工作中引入的不连续Galerkin(DG)方法的自适应实现(ForestDG)基于由由OCT- Quad-和二进制树组成的分层结构的计算网格的拓扑表示。 自适应网格细化(H-细化)使我们能够增加诸如接口,几何特征或流不连续性的感兴趣点附近的计算网格的空间分辨率。 在高应变速率或涡度幅度区域的膨胀顺序(P精炼)的局部增加导致剪切层和涡流区域的准确性顺序增加。

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